【Follow me Season 2 Episode 3】Simple button control LED experiment
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This post was last edited by breeze_i on 2024-11-4 21:21
When learning C language, the first program must be to print "Hello World!", and the first program for microcontroller is to light a lamp. Let's try to light a lamp today.
Open e2studio and create a blank project. In order to experience the pin configuration function, do not select Board. Select the chip model (R7FA6M5BH3CFC) on our development board in Device, as shown below. Use the default values for other options and click Next.
After successful creation, the FSP Configuration is as shown in the figure below.
Open the development board schematic, you can see there are three user LEDs and two buttons. The two buttons are not connected to capacitors.
Here I use the s1 button to control the blue LED, and achieve button scan debounce through blocking button scanning; each time the button is pressed and released, the blue LED state flips.
The key scanning speed cannot be too fast, otherwise instability will occur (when the LED is off, the LED will flash quickly instead of being constantly on when the key is pressed). After many attempts, it was found that the function can be stably implemented when the scanning cycle is greater than about 350ms.
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